JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2019
·Vol. 102
·期 10
·5989-5996
·
IF 3.094
Yue-Xing Chen,Kang-Di Shi,Fu Li,Xiao Xu,Zhen-Hua Ge,Jiaqing He
In recent years, BiCuSeO oxyselenides have been developed as a promising thermoelectric material. In this article, Pb x Bi 1− x Cu 1− y SeO ( x = y = 0, 0.02, 0.04, 0.06, and 0.08) are prepared by solid-state reaction method and spark plasma sintering (SPS), and the combinatorial effects of Pb doping and Cu deficiencies on thermoelectric properties are investigated systematically. The transport properties are significantly enhanced due to the optimized carrier density, majorly contributing to the promotion of ZT values. As a result, the maximum ZT of 0.77 at 873 K and average ZT (from 300 to 873 K) of 0.50 are obtained for Pb 0.06 Bi 0.94 Cu 0.94 SeO sample. The values are 0.4 and 1.2 times, respectively, higher than that of pristine sample.
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Desalination and Water Treatment
·
2024
·
IF 1
Peifei Ding,Weifeng Song,Chao Wang,Zefeng Yu
Metakaolin-based geopolymer was investigated as absorbent to remove Cu(II) and Pb(II) from aqueous solution. The effects of adsorbent quantity, pH, contact time, and initial concentration of Cu(II)/Pb(II) in solutions were investigated. Furthermore, kinetics and isothermal adsorption were fitted by using equations. Kinetic adsorption of Cu(II) and Pb(II) fitted well to pseudo-second-order model. The isothermal adsorption of two heavy metals by the metakaolin-based geopolymer fitted well with Langmuir isotherm adsorption model. The maximum monolayer adsorption capacities were found to be 178.6 mg/g (2.79 mmol/g) and 312.5 mg/g (1.51 mmol/g) for Cu(II) and Pb(II), respectively. Results clearly showed that the adsorption of metal ions on geopolymer was accompanied by ion exchange. Low-cost, convenient, and effective adsorption of Cu(II) and Pb(II) make metakaolin-based geopolymers potential candidates for heavy metal removal in wastewater treatment.
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MATERIALS LETTERS
·
2012
·
IF 2.307
Shiguo Chen,Yujuan Guo,Shaojun Chen,Zaochuan Ge,Haipeng Yang,Jiaoning Tang
Incorporation of nanoparticles is becoming a new strategy for improving antibacterial activity . In this paper, Copper (Cu)/titanium dioxide (TiO 2 ) (CTD) nanocomposite was easily prepared by photocatalytic reduction, and its structure as well as antibacterial activity in the absence of light was investigated in detail. The results show that the CTD nanocomposite exhibits good antibacterial activity even in the absence of light. The minimal inhibition concentration against Escherichia coli and Staphylococcus aureus is 21.4 μg/mL and 14.3 μg/mL, respectively, which are much lower than that of pure silver, Cu and TiO 2 nanoparticles . In addition, the enhanced antibacterial effect of the CTD nanocomposite may be explained by synergistic antibacterial effect.
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INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Xin Li,Xiaodie Zhu,Haitao Tang,Jian Zhang,Min Zhou,Qingpeng Peng,Bin Meng,Shuang Wang,·Alexey·Nikolaevich Yakovlev,Lei Zhao,Jie Yu,Xuhui Xu
Scintillator is a key component in X-ray detectors that determine the performance of the devices. Nevertheless, due to the interference of the ambient light sources, scintillators are only operated in a darkroom environment currently. In this study, we designed a Cu+ and Al3+ co-doped ZnS scintillator (ZnS: Cu+, Al3+) that introduces donor–acceptor (D–A) pairs for X-ray detection. The prepared scintillator displayed an extremely high steady-state light yield (53,000 photons per MeV) upon X-ray irradiation, which is 5.3 times higher than that of the commercial Bi4Ge3O12 (BGO) scintillator, making it possible in X-ray detection with the interference of ambient light. Furthermore, the prepared material was employed as a scintillator to construct an indirect X-ray detector, which performed a superior spatial resolution (≈10.0 lp/mm) as well as persistent stability under visible light interference, demonstrating the feasibility of the scintillator in practical applications. Therefore, this research presented a convenient and useful strategy to realize X-ray detection in a non-darkroom environment.
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Desalination and Water Treatment
·
2024
·
IF 1
Shuai Tang,Lujian Lin,Xuesong Wang,Anxin Feng,Xue Feng,Jing Kong
The kinetics of Cu(II) and fulvic acid (FA) adsorption onto biochar has been investigated. The modified biochar samples derived from rice husks were characterized by scanning electron microscopy equipped with the energy-dispersive X-ray spectroscope and Fourier transform-infrared spectroscopy. Some characteristic parameters, such as specific surface area and zeta potential, were also determined. The optimum condition of Cu(II) adsorption was temperature of 308 K, 2 g L –1 of adsorbent dosage and 25 mg L –1 of FA concentration. The maximum removal efficiencies of Cu(II) ions and FA were almost 81% and 94%, respectively. The experimental data for adsorption of Cu(II) and FA on modified biochar was fitted by various adsorption kinetic models. The results showed that the pseudo-second-order equation was the best-suited model. Elovich equation was consistent with the experimental data suggested chemical interactions between modified biochar and adsorbates. Also, the intraparticle diffusion model fitted the experimental data well, indicating that the process of Cu(II) and FA adsorption was diffusion-controlled. In addition, complexation reactions between FA and Cu(II) promoted the adsorption of adsorbates on modified biochar. The relatively high desorption efficiency proves the strong regeneration capacity of modified biochar.
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JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Yuyang Wang,Yi Fang,Yaxin Gu,Kai Guo,Zhonglu Guo,Chengchun Tang
The microecology and human health threats caused by the abuse of antibiotics are increasingly serious, for which it is urgent to develop highly efficient adsorbents. In the current study, Cu modified porous boron nitride nanofibers (BNNF-Cu) with uniform distributions and stable structures were successfully synthesized. The surface area of BNNF-Cu can reach to 737.194 m 2 g −1 , which includes porous microstructure and rich surface groups. The removal performance of BNNF-Cu as an adsorbent for ofloxacin (OFL) in aqueous solution was systemically studied. Due to the addition of modifier copper, the adsorption capacities for fluoroquinolones pollutants including OFL, norfloxacin (NOR) and enrofloxacin (ENR) were greatly enhanced. The adsorption kinetic data and equilibrium adsorption isotherms are in line with the pseudo-second-order and the Freundlich models ( R 2 = 0.999), respectively, indicating that the adsorption of OFL onto BNNF-Cu was mainly multilayer chemisorption. Significantly, the adsorbent exhibits excellent removal percentage for OFL (99.74%) and the maximum adsorption capacity can reach to 305.32 mg g −1 at the pollutant concentration of 100 mg L −1 . In addition, the influences of pH, temperatures and salinity on adsorption were also further researched. The outstanding removal efficiency can be maintained after several cycles, which proves excellent reusability. Finally, the BNNF-Cu adsorbent can offer a wide range of possibilities to eliminate antibiotics efficiently in industrial wastewater.
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Small
·
2023
·Vol. 19
·期 52
·2304718
·
IF 13.3
Zhi Li,Zhengyang Zhou,Jiawei Zhang,Chenxi Zhu,Pengfei Qiu,Tingting Deng,Fangfang Xu,Lidong Chen,Xun Shi
Materials with low thermal conductivity have received significant attention across various research fields, including thermal insulation materials, thermal barrier coatings, and thermoelectric materials. Exploring novel materials with intrinsically low thermal conductivity and investigating their phonon transport properties, chemical bonding, and atomic coordination are crucial. In this study, a novel ternary sulfide is successfully discovered, Cu 2 ZrS 3 , which is achieved by introducing copper ions into both the interlayer and intralayer of ZrS 2 . The resulting structure encompasses various coordination forms within each layer, such as [CuS 4 ], [ZrS 6 ], and [CuS 3 ], leading to pronounced phonon anharmonicity induced by the asymmetric bonding of tri-coordinated Cu atoms within the [ZrS 6 ] layer. As a result, Cu 2 ZrS 3 exhibits intrinsically low lattice thermal conductivity ( κ L ) of about 0.83 W m −1 K −1 at 300 K and 0.35 W m −1 K −1 at 683 K, which are in the exceptionally low level among sulfides. In comparison to the conventional approach of inserting guests between layers, the substitution of atoms within layers provides a novel and effective strategy for designing low κ L materials in transition metal dichalcogenides (TMDCs).
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Yuncong Li,Jianing Li,Ying Zhang
Cu on HAP aggregates then redisperses non-monotonically upon reduction. • Reconstructed interface stabilizes Cu 0 /Cu + and HPO 4 2- units. • Interfacial synergy drops E a from 88.1 to 69.3 kJ/mol, sharply enhancing activity. • H 2 reaction order drops from 1.20 to 0.25 after interfacial reconstruction. • DFT unveils Cu dissociating H 2 and adjacent Ca polarizing the carbonyl group. Constructing non-noble-metal hydrogenation catalysts with high activity, chemoselectivity, and durability under mild conditions is a key challenge in biomass valorization. While strong metal–support interactions on hydroxyapatite (HAP) typically involve noble metals via oxidative pathways, we report a reduction-induced interfacial reconstruction for Cu-HAP. During temperature-programmed reduction, Cu shows non-monotonic evolution: aggregation then redispersion into an anchored state at 600 °C, bypassing sintering. Spectroscopic and DFT reveal that HAP retains long-range order, while the Cu–HAP boundary stabilizes Cu 0 /Cu + and HPO 4 2- , enabling cooperative H 2 dissociation and carbonyl polarization. The optimized catalyst achieves quantitative furfural conversion with > 99% furfuryl alcohol selectivity (80 °C, 1.5 MPa H 2 ). Kinetic benefits include decreased E a (88.1→69.3 kJ/mol) and shifted H 2 order (1. 2 0→0.25). The catalyst also maintains stable performance over five cycles with negligible leaching. These findings highlight the distinctive role of HAP's Ca–PO 4 –OH environment in reduction-induced Cu redistribution and interfacial reconstruction, providing new insights into the design of cooperative metal–support interfaces for selective hydrogenation. Download: Download high-res image (248KB) Download: Download full-size image Temperature-programmed reduction induces non-monotonic redispersion of Cu on hydroxyapatite, producing a reconstructed interfacial boundary with stabilized Cu 0 /Cu + and HPO 4 2- species. DFT indicates cooperative catalysis at this interface: Cu activates H 2 while adjacent Ca polarizes the carbonyl group. The decrease in apparent activation energy (88.1–69.3 kJ/mol) and the shift in H 2 reaction order (1.20–0.25) underlie the quantitative furfural conversion and > 99% furfuryl alcohol selectivity achieved under mild conditions (80 °C, 1.5 MPa H 2 ).
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ACS Nano
·
2020
·
IF 14.588
Yuxuan Lin,Zhichao Huang,Xiaojie Wen,Wenhui Rong,Zhantao Peng,Mengxiao Diao,Lingbo Xing,Jingxin Dai,Xiong Zhou,Kai Wu
Among the multitudinous methodologies to steer on-surface reactions, less attention has been paid to the effect of externally introduced halogen atoms. Herein, highly selective trans-dehydrogenation coupling at the specific meta-C–H site of two poly(p-phenylene) molecules, p-quaterphenyl (Ph4) and p-quinquephenyl (Ph5), is achieved on Cu(111) by externally introduced bromine atoms. Scanning tunneling microscopy/spectroscopy experiments reveal that the formed molecular assembly structure at a stoichiometric ratio of 4:1 for Br to Ph4 or 5:1 for Br to Ph5 can efficiently promote the reactive collision probability to trigger the trans-coupling reaction at the meta-C–H site between two neighboring Ph4 or Ph5 molecules, leading to an increase in the coupling selectivity. Such Br atoms can also affect the electronic structure and adsorption stability of the reacting molecules. It is conceptually demonstrated that externally introduced halogen atoms, which can provide an adjustable halogen-to-precursor stoichiometry, can be employed to efficiently steer on-surface reactions.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Chao Li,Pengfei Zhao,Bo Ma,Dongxuan Xie,Xiaofei Liu,Songhan Hu,Yingchun Diao,Kai Wang,Yonghui Ma,Qiang Wang
Red-emissive Cu nanoclusters were synthesized via a green room-temperature strategy using glutathione and ascorbic acid. • Zn 0.4 Mn 0.6 Fe 2 O 4 nanoparticles were selected as the magnetic component owing to their superior magnetic properties over conventional Fe 3 O 4 . • Cu nanocluster-decorated Zn 0.4 Mn 0.6 Fe 2 O 4 nanocomposites were successfully fabricated through a simple assembly process. • The optimized nanocomposite integrated bright red fluorescence with excellent T 2 -weighted magnetic resonance performance. • A green and low-cost strategy was developed for constructing multifunctional fluorescence/MR nanocomposites. Given the intrinsic limitations of single-modality imaging, integrating optical and magnetic functionalities into a single nanoplatform offers a promising strategy for multimodal imaging. Herein, Cu nanocluster-decorated Zn 0.4 Mn 0.6 Fe 2 O 4 nanocomposites (CuNCs-ZMF) were rationally fabricated for dual-modal fluorescence and magnetic resonance imaging. Glutathione-protected CuNCs were synthesized using ascorbic acid as a mild reductant, while superparamagnetic Zn 0.4 Mn 0.6 Fe 2 O 4 nanoparticles were synthesized via thermal decomposition and subsequently surface-functionalized with cetyltrimethylammonium bromide to improve aqueous dispersibility and facilitate assembly with CuNCs. The resulting CuNCs-ZMF exhibited red fluorescence centered at 660 nm with an absolute quantum yield of 5.89% and a transverse relaxivity ( r 2 ) of 160.52 mM −1 s −1 . T 2 -weighted MR imaging demonstrated Fe concentration-dependent negative contrast enhancement, while in vivo imaging revealed pronounced darkening of the liver region following intravenous administration. CCK-8 assays further demonstrated relatively favorable cytocompatibility at low-to-moderate concentrations. These results demonstrate the successful integration of fluorescence and magnetic resonance imaging capabilities and support the potential of CuNCs-ZMF for fluorescence/MRI dual-modal imaging applications.
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ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Rong Huang,Zhong Dong,Wanyi Zhang,Zhenggang Xue,Dongmei Deng,Wei Wang,Yuanyuan Li,Haibo He,Liqiang Luo
Background Organophosphorus pesticides contamination significantly threatens the ecological environment. Therefore, developing sensitive and efficient point-of-care detection methods is essential. Results In this work, Cu−N 4 single-atom nanozymes on nitrogen-doped carbon (Cu SAs/NC) with dual enzyme-mimicking activities (peroxidase-like and oxidase-like) were prepared for point-of-care detection of parathion using acetylcholinesterase inhibition-based colorimetric sensing mechanism. Cu SAs/NC shows high catalytic activity with high turnover number (K cat ) of ∼24.07 min −1 and K cat /K m of ∼1.35×10 5 M −1 min −1 . Experimental findings in combination with density functional theory simulations demonstrate that Cu centers in Cu SAs/NC play a pivotal role in intermediate binding optimization, which contributes to a decreased reaction energy barrier. Hence, a colorimetric sensing platform based on Cu SAs/NC was constructed for point-of-care detection of parathion, achieving a detection limit of 0.79 ng mL −1 . Significance This study provides a novel strategy for structuring single-atom nanozymes with enhanced enzyme-mimicking activity, showing great promise for advanced environmental protection.
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DOI
PubMed
高影响因子
Advanced Healthcare Materials
·
2025
·
IF 9.6
Yi Liu,Xujie Cui,Minhao Guo,Jinmei Wu,Yulan Zhao,Guangzheng Zhang,Jiahui Xu,Heyou Han,Weihui Li,Zhiyong Song
Drug-resistant bacterial infections pose a significant threat to global health, creating an urgent need for new antimicrobial agents. Reusing approved drugs has gained attention as a strategy to address this issue. In this study, a nano antibacterial platform (DSF@HKUST-1@Dex) that responds to the infection microenvironment is proposed. This platform releases disulfiram (DSF), binds to copper ions in the mildly acidic conditions of infected areas, converting DSF from nontoxic to toxic in situ, thereby inducing bacterial death and enhancing copper ion absorption. Noncatalytic treatment is also initiated for a synergistic antibacterial effect. Excessive copper ions disrupt bacterial metabolism, inhibit the Tricarboxylic acid (TCA) cycle, reduce ATP levels, and induce cuproptosis-like death, significantly enhancing antibacterial efficacy. In a bacterial wound infection model, the platform exhibited excellent antibacterial activity, promoting wound healing and reducing inflammation. Proteomic analysis showed that the platform selectively targeted bacterial peptidoglycan, disrupted the bacterial cell wall, impacted energy metabolism, and inhibited bacterial growth. In conclusion, this nanoplatform offers a promising strategy for treating drug-resistant infections by repurposing old drugs, converting them to toxic forms, and providing a novel antimicrobial approach.
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PubMed
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